Labour is in a tricky spot, having to figure out how to balance the budget and keep their promises about taxes.
They've said they won't raise taxes, but they might have to give public sector workers, like teachers and nurses, bigger pay rises.
These pay raises would cost a lot of money, and experts say it's hard to see how Labour can afford them without raising taxes or borrowing more money.
It's a tough choice: do they stick to their promises about taxes or give workers the money they want?
